Door-lock



E. BRADSHAW.

Doo LOCK. l APPLICATION FILED APR.1,1919.

Patented Dec. 21, 1920.

FIG', 4.

J @mi UNITED' STATES EDWIN BRADSI-IAW, O F SAN FRANCISCO, CALIFORNIA.

DOOR-LOCK.

Specification of Letters Patent.

Patented Dee. 21, 1920.

Application'led April 1, 1919. Serial No. 286.641.

T o all whom t may concern:

Be it known that I EDWIN BRADSHAW, a citizen of the United tates, residing at San Francisco, in the county of San Francisco and State of California, have invented new and useful Improvements in Door-Locks, of which the following is a specification.

This invention relates to a door lock.

One of the objects of the present invention is to provide a door lock which is simple and substantial in construction, cheap to manufacture and easy to operate and which is provided with a novel form of bolt or latch retracting mechanism adapted vto be operated directly from the spindle of the lock.

Another object of the invention is to provide a door lock which may be applied to a door by merely boring two holes therein, one at right angles to the other, and which may be secured when placed in position, without the use of screws, bolts or the like.

Further objects will hereinafter appear.

The invention consists of the parts and the construction, combination and arrangement of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which-f Figure 1 is a plan section of the lock, showing it applied to a door.

Fig. 2 is a perspective view of the latch and the mechanism attached thereto.

Fig. 3 is a perspective View of lthe retracting caml Fig. 4 is a side elevation of the lock.

Referring to the drawings in detail, A indicates the main frame of a door, land 2, the panel supported thereby; A

Formed in the frame by means of a wood boring tool, are a pair of openings 3 and 4. Adapted to extend through the opening 3 is a spindle 5 and supported by said spindle are a pair of knobs 6 and 7 A lock casing is in this instance entirely eliminated and the spindle is therefore supported. and journaled in a pair of bearing members 8 and 9. These members are provided with eXten-vv sions 10 adapted to enter the opening 3 and they are secured in position when placed in the opening, the knob supported thereby. The spindle is threaded at each end or over its entire length, if desired, and the knobs employed are screwed on and then secured against removal by screws such as shown at 11, the

by means of the spindle and outer knob 6 being preferablypermanently secured while the knob 7 may be secured by the screw 11 to permit its removal if it is desired to remove the lock or repair the mechanism employed.

The latch shown at 12 is in this instance sldably mounted in a casing 13. This casing is circular in cross section and is inserted in the opening 4. The forward end of the casing is provided with an annular' shown in Fig.. 1. It may, however, be re-r tracted when either knob is turned, by means of a compound retracting cam 16.v This cam is loosely mounted on the spindle but is se- `cured against turning movement as the square opening 17 is formed in the hub of the cam which loosely fits the spindle and asI this is,prac`tically speaking, square in cross section it will readily be seen that turning movement of the spindle Vwill impart a turning movement to the cam. This movement is transmitted to' retractv the latch 12, whether the spindle is turned in one direction or the other, due to the compound actionof the cam 16, as this engages an eX- tension 18 forming a portion of the latch 12.

The extension is in reality nothing more ,ort-190 less than a yoke frame, this framebeing slotted, as shown at 19, to permitl the spindle to pass therethrough and also to permit reciprocal movement yto be imparted to the `latch when-this is retracted by the cam or projected by means of the spring 15. The cam 16 engages the rear end 18 of the yoke frame forming the extension of the latch and as the side sections on the yoke frame are disposed one on each side of the cam, it can readily be seen that it secures the cam against end-wise movement upon the spindle, thereby eliminating any necessity of securing the cam.

From the foregoing description, it should be obvious that a lock of simple and compact construction has been provided; also, that it may be easily applied by any mechanic, whether skilled or otherwise, as the only work required is the boring of the openings 3 and 4. Any ordinary brace and bit can be employed for this purpose and Will therefore not require a loss of time nor skill, as perfect-alinement of the holes boredV is not absolutely necessary, due to the fact that considerable latitude is permitted when connecting the yoke frame extension formed l on the latch with the spindle.

In actual operation, when the holes have been bored, it will only be necessary to insert the casing 13 which carries the latch and the extension formed thereon. The cam 16 is then placed within the extension and the spindle is then passed through one of the bearing members, the yoke frame and the cam mounted therein. The opposite bearing member may then be placed in position spindle.

and the knob applied by screwing it into position and then iinally securingV it by means of a screw 11. The whole operation of applying the lock may therefore be easily accomplished and all parts are secured in position without the use of a single screw or bolt as the bearing members 8 and 9 are rheld against lateral movement by means of n thespindle and the knobs and the casing 13,

together with the latch carried thereby, is secured against removal by means of the Referring to Fig. 1, it will be seen that the spindle is journaled in. the bearing mem- A bers 8 and 9. It will also be seen that the to suit different applications; similarly, that Y the'materials and finish of the-several parts Vemployed may be such as the experience and judgment of the manufacturer may dictate.

Having thus described ymy invention,

what I claim and desire to secure by Letters Patent is 1. In a door lock, a casing, a latch, a yoke frame having *spacedV sides one of which is connected at one end to the latch and having its sides connected by a wall at the opposite end of the frame, said casing having a rear wall through which said side of the yoke frame slides, a coil spring in the casing abutting the latch and the rear wall ofthe yoke frame at its ends, a spindle extending through the sides of the yoke frame, and a double ended cam having each ofv its ends operating against the rear wall of the yoke frame. Y A f 2. In a door lock, a spindle, a casing, a yoke frame havingV spaced sides through which the spindle extends, said frame having a part thereof passing through said casing, a rear wall connecting the sidesjofthe yoke frame, a latch connected to the yoke frame, a spring inthe casing Vabuttingthe rear wall ofthe casing and the latch, and a double ended cam fixed on the spindle and operating in the space between the yoke` frame sides and against the rear wall Vconnecting the'latterl- 3.V In a door lock, a'casing', a spindle, a yoke frame having a long and a short side through which sides the spindle extends and having a rear wall connecting the sides, said casing having an opening through which the long side of theyoke Aframe extends, a latch carried by the front end ofthe long side of the yokeframe,a coil spring between said latch andv the rear of the casing to urge the latch outwardly of the casing, and a cam on the spindle engaging the rear wall of Vthe yoke frame and arranged between said sides of the yoke frame, the short side Vof the yoke framebeing arrangedV t'o the rear of the casing.

In testimony whereof I my ,hand in the witnesses.

have hereunto set EDWINV BRADSHAW.

Witnesses:

THos. CASTBERG, VGr. M. BALL.

presence of two subscribing 

